Question # 1

Which molecule contains a single vovalent bond.

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CH4

C2H4

C2H2

O2

Predict which components of the amosphere react in the presence of lightening.

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N2 and H2O

O2 and H2O

N2 and O2

CO2 and O2

Metals are teh elements which have.

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Electronegative character

Electropositive character

Both a and b

None of the above

What conditon Should be met for the reversible reactio to achieve the state of equilibrium.

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The concentratio of all the reactants and the prodduct should become constant

all the reactants should be converted into the product

50% of the reactant shuld be converted into prodcuts.

One of the product should be removed from the reaction mixture.

Who performed fist experiment to split atom

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Bohr

Newton

Rutherford

Soddy

Mass Number is repreented by

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Z

S

A

M

In the beginning the rate of reverse reaction is.

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Slow

very fast

Moderate

Negligible

Which branch of chemistry helps to protectwater that bas been poisoned by soil.

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Organic chemistry

inorganic chemistry

Environmenal chemistry

Geochemistry

Which of the following contains oxalic acid

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Orange

Sour Milk

Tomato

Tamarind

17th Group of elements contain electrons in their outer most shell

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4

5

7

6

Formula of Ozone.

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O₂

S₈

CO₂

O₃

Sea water in unfit for drinking purpose die to the presence of.

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Salts

Algae

Fishes

All of them

In hydrogenation of vegetable oil catalyst employed is.

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Ni

Pt

ZnO

Cr₂O₃

Night blindness is because of deficiency of:

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Vitamin A

Protein

Vitamin C

Vitamin D

The depletion of which gas results in the death of aquatic life.

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Oxygen

Carbon di oxide

Boath of them

Nome of them

The meaning of latin word acidus is.

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Sweet

Tasteless

Salty

Sour

The range of temperature in burning solid waste burning in incinerators is.

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650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

At the time of partition, How many industries wee present in Pakistan.

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30

32

34

40

Condensed formula of ethane is.

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C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

Reactions which have comparable amounts of reactants and products at equilibrium state have:

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very small Kc value

Very large Kc value

Moderate Kc value

None of these

Which chemical is called king of chemicals?

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KNO₃

H₂SO₄

HCl

NHO₃

Calcium has isotopes

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7

9

1

6

The nature of positive rays depends on

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The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

Solvent extraction is an equilibrium process and it is controlled by.

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

"The components of which mixture can be separated by filtration".

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NaCl and CaCl2

Calcium carbonate and NaCl

Blue and green inks

Sand and naphthalene

How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure.

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50

90

180

200

In which compound oxidation state of chlorine is +5

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NaCl

HOCl

NaClO3

NaClO2

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

The nature of positive rays depends on

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The nature of electrode.

The nature of discharge tube

The nature of residual gas

All of the above

The wave number of the light emitted by a certain source is 2 x 10⁶m. the wavelength of this light is

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500 nm

500 m

200 nm

5 x 10⁷m

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

The pressure of oxygen inside the bomb calorimeter is.

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100 atm

50 atm

25 atm

20 atm

Which oxide is more basic in nature.

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Beo

MgO

CaO

BaO

Aromatic hydro carbon are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

Out of the elements of group VA, the highest energy is possessed by

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N

P

Sb

Bi

Which of the following element is not present in all proteins

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Carbon

hydrogen

Nitrogen

Sulphur

The diameter of rotary kiln in the manufacture of Portland cement is.

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1 to 2 feet

2 to 4 feet

4 to 8 feet

8 to 15 feet

Geometrical isomerism in alkene is due to.

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C = C free rotation of bond

No C = C free rotation of bond

Presence of multiple bond only

Opticla rotation due to multiple bond

Elimination Bimolecular reactions involve

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Second order kinetics

First order kinetics

Third order kinetics

Zero order kinetics

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Aluminium oxide is

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Acidic oxide

Baric oxide

Amphoteric oxide

None of these

Kerosene oil is a mixture of hydrocarbon having carbon

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11 to 13

10 to 12

11 to 12

8 to 9

The aromatic ring of Benzene can be hydrogenated in the presenc eof.

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Pt

Rh

Sunlight

O3